var  highlightcolor='#f5f2ef';
//此处clickcolor只能用win系统颜色代码才能成功,如果用#xxxxxx的代码就不行,还没搞清楚为什么:(
var  clickcolor='#51b2f6';

function  changeto(){
  source=event.srcElement;
  if(source.tagName=="TR"||source.tagName=="TABLE") {
	  return;
  }

  while(source.tagName!="TD")
    source=source.parentElement;
  
  source=source.parentElement;
  cs = source.children;
  //alert(cs.length);
  if(cs[1] && ('style' in cs[1])) {
	  if(cs[1].style.backgroundColor!=highlightcolor && source.id!="nc"&&cs[1].style.backgroundColor!=clickcolor) {
	    for(var i=0;i<cs.length;i++){
		  cs[i].style.backgroundColor=highlightcolor;
	    }
	  }
  }
}

function  changeback(){
  if(event.fromElement.contains(event.toElement)||source.contains(event.toElement)||source.id=="nc") {
    return;
  }
  
  if(cs[1] && ('style' in cs[1])) {
    if(event.toElement!=source&&cs[1].style.backgroundColor!=clickcolor)
    //source.style.backgroundColor=originalcolor
    for(var i=0;i<cs.length;i++){
      cs[i].style.backgroundColor="";
    }
  }
  
}

function  clickto(){
source=event.srcElement;
if  (source.tagName=="TR"||source.tagName=="TABLE")
return;
while(source.tagName!="TD")
source=source.parentElement;
source=source.parentElement;
cs  =  source.children;
//alert(cs.length);
if  (cs[1].style.backgroundColor!=clickcolor&&source.id!="nc")
for(var i=0;i<cs.length;i++){
	cs[i].style.backgroundColor=clickcolor;
}
else
for(i=0;i<cs.length;i++){
	cs[i].style.backgroundColor="";
}
}